76798649 has 2 divisors, whose sum is σ = 76798650. Its totient is φ = 76798648.

The previous prime is 76798621. The next prime is 76798661. The reversal of 76798649 is 94689767.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54169600 + 22629049 = 7360^2 + 4757^2 .

It is an emirp because it is prime and its reverse (94689767) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76798649 - 2²⁴ = 60021433 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 76798594 and 76798603.

It is not a weakly prime, because it can be changed into another prime (76798949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38399324 + 38399325.

It is an arithmetic number, because the mean of its divisors is an integer number (38399325).

Almost surely, 2^76798649 is an apocalyptic number.

It is an amenable number.

76798649 is a deficient number, since it is larger than the sum of its proper divisors (1).

76798649 is an equidigital number, since it uses as much as digits as its factorization.

76798649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4572288, while the sum is 56.

The square root of 76798649 is about 8763.4838392046. The cubic root of 76798649 is about 425.0609352075.

The spelling of 76798649 in words is "seventy-six million, seven hundred ninety-eight thousand, six hundred forty-nine".